Letís say youíre going on a trip into the backcountry to fish for 4 days with highs from the 60ís-70ís and lows in the 30-40 degree range. What type of clothing and how many changes of clothes would be good? Do you just take one change of clothes and rinse the other out and hang dry and wear the next day? Iím taking my first backcountry trip soon and I donít want to over-pack but I also donít want to under-pack either. Feel free to be very detailed.